Hi i have just started J S F few days before and i am now stuck in a problem and the definition is given below. Problem: I have a check box named "Select All" and a list of Check Boxes (generated using a data table). When you click "Select All" all check boxes in data table should be clicked automatically. This i have achieved through "valueChangeListner" and its working fine. But the real problem comes, when i uncheck any of the check box inside datatable, "Select All" check box should be unchecked.